Volley, Vanishing Dragon

Flying, Wither
When a permanent with a counter on it leaves the battlefield you may draw a card if you do discard
a card. If the card you drew is a instant or sorcery reveal it, that spell costs {2} less to cast until the
end of your next turn
When this creature deals combat damage to a player
you may instead put -1,-1 counters onto a creature
that player controls equal to damage dealt this way